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Method for manufacturing polyurethane automobile auxiliary spring

A manufacturing method, polyurethane technology, applied in the direction of coating, etc., can solve the problems of low production efficiency, high mold cost, high labor cost, etc., and achieve the effects of low production cost, simple and practical preparation method, and high production efficiency

Active Publication Date: 2012-10-17
TIANJIN AINY ELE MECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, polyurethane auxiliary springs are mainly prepared by casting molding; the main disadvantages are: low production efficiency; high energy consumption; high mold costs; high labor costs;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: wherein every mass part is 100kg

[0018] Step 1: Preparation of polyurethane prepolymer

[0019] Weigh 100 parts by mass of polyethylene adipate diol with a number average molecular weight of 2000, put it into a reaction kettle, heat to 130°C, evacuate until the residual pressure in the kettle is less than 500pa, dehydrate for 3 hours, and cool down to 120°C Finally, put in 19 parts by mass of 1,5-naphthalene diisocyanate, heat up to 130°C and react for half an hour to obtain a prepolymer;

[0020] Step 2: Preparation of chain extender

[0021] Weigh 100 parts by mass of polyethylene adipate diol with a number average molecular weight of 2000 that has been dehydrated, put it into a preparation kettle and keep it warm at 55°C, weigh 10 parts by mass of distilled water, and 10 parts by mass of emulsifier; 500rpm Stir vigorously for 10 minutes and set aside;

[0022] Step 3: Preparation of polyurethane elastomer particles

[0023] Add the prepared prepol...

Embodiment 2

[0032] Embodiment 2: wherein every mass part is 500kg

[0033] Step 1: Preparation of polyurethane prepolymer

[0034] Weigh 100 parts by mass of polyethylene adipate diol with a number average molecular weight of 2000, and put it into a reaction kettle. Heat to 130°C, evacuate until the residual pressure in the kettle is less than 500pa, dehydrate for 3 hours, cool down to 120°C, add 25 parts by mass of 1,5-naphthalene diisocyanate, raise the temperature to 130°C and react for half an hour to obtain the prepolymer .

[0035] Step 2: Preparation of chain extender

[0036] Weigh 100 parts by mass of polyethylene adipate diol with a number average molecular weight of 2000 that has been dehydrated, put it into a preparation kettle and keep it warm at 55°C, weigh 10 parts by mass of distilled water, and 10 parts by mass of emulsifier; 500rpm Stir vigorously for 10 minutes and set aside.

[0037] Step 3: Preparation of polyurethane elastomer particles

[0038] Put the prepared...

Embodiment 3

[0047] Embodiment 3: wherein every mass part is 200kg

[0048] Step 1: Preparation of polyurethane prepolymer

[0049] Weigh 100 parts by mass of polyhexanediol adipate diol with a number average molecular weight of 2000, and put it into a reaction kettle. Heat to 130°C, evacuate until the residual pressure in the kettle is less than 500pa, dehydrate for 3 hours, cool down to 70°C, add 30 parts by mass of 3,3'-dimethyl-4,4'-biphenyl diisocyanate, and heat up to React at 100°C for 2 hours to obtain the prepolymer.

[0050] Step 2: Preparation of chain extender

[0051] Weigh 100 parts by mass of polyhexanediol adipate diol with a number average molecular weight of 2000 that has been dehydrated, put it into a preparation kettle and keep it warm at 55°C, weigh 10 parts by mass of distilled water, and 10 parts by mass of emulsifier; 500rpm Stir vigorously for 10 minutes and set aside.

[0052] Step 3: Preparation of polyurethane elastomer particles

[0053] Put the prepared p...

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PUM

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Abstract

The invention discloses a method for manufacturing an automobile auxiliary spring, which has higher production efficiency and lower cost. The method for manufacturing the polyurethane automobile auxiliary spring more particularly comprises the steps that: 1. preparation of polyurethane prepolymer: using diisocyanate and oligomer polyol which have the mass ratio of 15-55:100 to prepare the polyurethane prepolymer; 2. preparation of chain extender: the chain extender comprises polyester polyol, emulsifying agent and distilled water which have the weight ratio of 100:10-20:10-20; 3. preparation of polyurethane elastomer granules: using a pouring machine to mix the prepolymer and the chain extender according to the mass ratio of 100:5-15; and 4. drying and evenly mixing the obtained mixture in a mixer, and then adding into an injection molding machine for injection molding. The preparation method is simple and practical, low in production cost and high in production efficiency; and the raw materials can be recycled.

Description

technical field [0001] The invention relates to a manufacturing technology of a polyurethane automobile auxiliary spring, in particular to a manufacturing method of an automobile auxiliary spring suitable for high-end vehicles. Background technique [0002] The auxiliary spring of the automobile mainly plays the role of absorbing vibration and improving ride comfort. Present auxiliary spring is mainly made of two kinds of materials of rubber and polyurethane. Compared with rubber auxiliary springs, polyurethane auxiliary springs have the advantages of light weight, long life and good compression performance. However, at present, polyurethane auxiliary springs are mainly prepared by casting molding; the main disadvantages are: low production efficiency; high energy consumption; high mold costs; high labor costs; Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide an automobil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/00B29C39/44B29B9/00B29B13/06C08G18/10C08G18/12C08G18/42
Inventor 胡兴平
Owner TIANJIN AINY ELE MECHANICAL